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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3760/CH4/EX4.50/Ex4_50.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3760/CH4/EX4.50/Ex4_50.sce')
| -rw-r--r-- | 3760/CH4/EX4.50/Ex4_50.sce | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/3760/CH4/EX4.50/Ex4_50.sce b/3760/CH4/EX4.50/Ex4_50.sce new file mode 100644 index 000000000..3256f2ca3 --- /dev/null +++ b/3760/CH4/EX4.50/Ex4_50.sce @@ -0,0 +1,16 @@ +clc;
+v=250; // supply voltage
+i=50; // current drawn from supply
+ic=0.4; // percentage increase in speed
+T=1.2; // ratio of final and initial torque
+n=1.4;// ratio of final and initial speed
+ra=0.5; // armature resistance
+Ea1=v-i*ra; // counter EMF at initial speed
+// ia2=(T2/T1)*ia1*k where k=f1/f2 and T1 is initial torque and T2 is final torque now writing Ea2(counter EMF at 1000rpm) in terms of k and finding value of k by solving quadratic equation in k whose terms are
+t1=T*ra*i;
+t2=-v;
+t3=n*Ea1;
+p=[ t1 t2 t3 ];
+k=roots(p);
+fr=(1-(1/k(2)))*100;
+printf('Percentage reduction in field flux is %f percent',fr);
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